US3429321A - Safety valve actuator - Google Patents

Safety valve actuator Download PDF

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Publication number
US3429321A
US3429321A US695053A US3429321DA US3429321A US 3429321 A US3429321 A US 3429321A US 695053 A US695053 A US 695053A US 3429321D A US3429321D A US 3429321DA US 3429321 A US3429321 A US 3429321A
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US
United States
Prior art keywords
valve
chamber
spring
pressure
trigger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US695053A
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English (en)
Inventor
Walter I Thrall
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elster American Meter Co LLC
Original Assignee
American Meter Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by American Meter Co Inc filed Critical American Meter Co Inc
Application granted granted Critical
Publication of US3429321A publication Critical patent/US3429321A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/08—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for providing a large discharge passage
    • F16K17/085—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for providing a large discharge passage with diaphragm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
    • F16K17/38—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
    • F16K17/383—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature the valve comprising fusible, softening or meltable elements, e.g. used as link, blocking element, seal, closure plug
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/1624—Destructible or deformable element controlled
    • Y10T137/1797—Heat destructible or fusible
    • Y10T137/1819—Safety cut-off
    • Y10T137/1834—With external closing means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7723—Safety cut-off requiring reset
    • Y10T137/7725—Responsive to both high and low pressure or velocity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7723—Safety cut-off requiring reset
    • Y10T137/773—Fluid released trip

Definitions

  • a valve actuator responds to overpressure or underpressure Outside a preselected range to operate a movlable valve part, both ends of the range being adjustable, and the force applied by the actuator is unaffected by the intensity of the pressure.
  • the device also responds to manual operation, temperature or other condition.
  • This invention relates to a valve actuator apparatus and is particularly directed to improvements in controlling the flow of fluid when the fluid pressure either exceeds a predetermined maximum or drops below a predetermined minimum.
  • Such a device is particularly useful .in those situations where the increase or decrease in pressure would create a hazardous condition. Such is the situation where the pressure in a fluid flow line becomes high enough to cause a break in the line or exceeds the safe maximum pressure for the system, or where there is a leak in the line indicated by low pressure.
  • the present invention responds to either a predetermined maximum or minimum pressure, but more important, the high and low ends of the pressure range can be easily adjusted and are independent of one another. This added feature makes the device adaptable to a variety of fluid flow systems. Furthermore, once the device has been installed in a system either the high pressure limit or the low pressure limit can be adjusted to give improved performance.
  • the invention can also respond to a temperature change as well as a pressure change, it is useful in fire prevention.
  • the invention can be adapted to respond to a sudden movement and thereby protect a system in an earthquake condition.
  • FIGURE 1 is a sectional view showing a preferred embodiment of this invention.
  • FIGURE 2 is a sectional view taken substantially on the lines 2 2 as shown in FIGURE 1.
  • FIGURE 3 is a sectional view showing a preferred embodiment of the reset key used in connection with this invention.
  • FIGURE 4 is a fragmentary view in section showing a modification.
  • a casing assembly generally designated includes a spring housing 11, a release housing 12 and a valve body 13. While the valve body d3 can be formed in various ways, the preferred embodiment as shown in FIGURE 1 discloses a normally open valve.
  • the valve body 13 contains an inlet chamber I14 and an outlet chamber 15 separated by a divisional web :16.
  • the web 16 has an opening which is internally threaded to receive a stationary valve seat 17.
  • a stem assembly generally designated 18 is centrally positioned within and extends throughout the spring housing 11 and the release housing 1 2 and into the valve body 3,429,321 Patented Feb. 25, 1969 13.
  • the stem assembly 18 includes a hexagonal shaft 19, a round shaft 20 and another larger round shaft 20a.
  • the hexagonal shaft 19 is threaded externally at both ends with the lower end connected to the internally threaded upper end of the round shaft 20.
  • Fixed between the two shafts 19 and 20 is a circular collar 21.
  • Round shaft 20 has a smooth surface and may be chrome plated or otherwise treated to decrease surface friction.
  • a circular cam member 22 is mounted coaxially between a hexagonal portion 23 of shaft 20 and a shoulder 23a of shaft 20a.
  • the outer surface 24 of cam member 22 is conical and extends in a downward and outward fashion.
  • the shaft 20a is hexagonally shaped and internally threaded at its lower end. Connected to this hexagonal end is a valve head '25.
  • valve head 25 is held in place by means of a screw 25a which passes through a central opening 26 in the valve head 25 and engages the internal threads in the lower end of shaft 20a.
  • a seal ring 26a fits concentrically with the valve head 25 and the valve seat 17 when the valve is in a closed position.
  • Shaft 20a is hollow to form the passage 27 which coincides with a similar passage 27a in the lower end of shaft 20.
  • a central opening 28 in the screw 25a and circular openings 28a in the hexagonal portion of shaft 20 provides for pressure communication between the outlet chamber 15 and the diaphragm chamber 28b.
  • the release housing 12 is cup like in shape with a narrow stem portion 12a and a flanged base which is connected to the valve body '13. -An O-ring 29 seals the release housing 1 2 to the valve body 13.
  • the stem portion 12a is provided with a central circular opening 60 in which the shaft 20a vertically slides.
  • An O-rin-g 31 seals the shaft 20a to the release housing 12.
  • a wiper 32 prevents dirt particles from interfering with the O-ring 31.
  • a bifurcated trigger 33 Within the release housing 12 is a bifurcated trigger 33, with the shaft 20 positioned between two parallel identical sides 34 and 35 of the trigger 33.
  • the trigger 33 is provided with lever arms 36 and 37.
  • a spring 38 is mounted between the underside of lever arm 36 and the inner surface of the horizontal wall of the release housing 12 to hold the trigger in position as shown in FIGURE 1.
  • Spaced pins 39 and 40 are mounted within the walls of the housing 12 and provide an axis about which the trigger 33 pivots.
  • a cylindrical rod 41 extends through aligned openings 42a in the legs of a U shaped connector 42 and the ends of rod 41 are connected to the sides 34 and 35, respectively, with the lower surface of cam member 22 engaging the cylindrical rod 41.
  • a pull rod 43 is connected to the U shaped connector 42 and is slidably mounted within a sleeve guide 44.
  • O-ring 45 seals the pull rod 43 to the sleeve guide 44 and prevents leakage.
  • Threaded openings 46 and 47 in the side Wall of the release housing 12 receive the sleeve guide 43 and a plug 48, respectively.
  • An O-ring 50 prevents leakage between the sleeve guide 43 and the release housing 12.
  • a flexible diaphragm 51 Secured between and separating the spring housing 11 and the release housing .12 is a flexible diaphragm 51.
  • the inner edge of the diaphragm 51 is held between a pair of disks 52 and 53.
  • the disk 52 is mounted on the upper surface of the diaphragm and has a vertical flange 54 which extends upward.
  • Disks 52 and 53 and the diaphragm 51 are provided with aligned central openings and mounted coaxially within these openings is a sleeve 55 in which a portion of shaft 20 slides vertically.
  • An O-ring 56 and wiper 57 seal the shaft 20 to the sleeve 55 and prevent leakage.
  • the sleeve 55 extends outwardly at the bottom to form a plate 58 to hold the disk 53- and the lower side of the plate 58 is provided with a pusher 59 and a stirrup 60.
  • the spring housing 11 includes a generally cylindrical body 62 having a flange 63 and internal threads 64. Positioned coaxially within the body 62 is an annular maximum-pressure adjusting collar 65 having external threads 66 which engage the threads 64.
  • the maximum-pressure adjusting collar 65 is provided with lugs 67 which enable the collar to be turned within the body 62 to move the collar 65 axially along the threads 64.
  • Internal threads 68 on the collar 65 engage the external threads 69 on a minimum-pressure adjusting collar 70, which is positioned coaxially within both the body 62 and the collar 65. Lugs 71 enable the collar to be turned and adjusted axially.
  • the collar 70 has a central opening 72 which receives the hexagonal shaft 19.
  • a maximum-pressure spring 73, a minimum-pressure spring 74, and a valve closing spring 75 are positioned concentrically in the body :62. The upper end of the spring 73 engages the collar 65.
  • a carrier 76 holds the lower end of spring 73 and is provided with a flange 77 extending outwardly. The travel of the carrier is limited by a shoulder 78 on the inner wall of the body 62 which engages the flange 77. the lower side of the carrier 76 meets the flange 54 on the disk '52.
  • the ends of the spring 74 are positioned between the collar 70 and the ring 61.
  • the upper end of the closing spring 75 is also held by the collar 70 with the lower end abutting the collar 21 on the stern assembly 18.
  • a spring cap 79 is connected to the body 62 and is provided with a threaded central opening 80 which receives a cap closure screw 81.
  • the body 62 has a vent opening '82 which allows the pressure in the spring housing 11 to be controlled.
  • a restrictive passage 82a in the vent 82 will prevent flow out of the spring housing 11 in excess of its capacity, thereby activating the valve when the leakage past the diaphragm 51 exceeds a predetermined amount.
  • the operation of the device as shown in FIGURES L3 is as follows:
  • the maximum-pressure spring 73 and minimum-pressure spring 74 are each adjusted to exert the desired axial force.
  • fluid under pressure pass s from chamber 14 through the passage 27 into the diaphragm chamber 28b and exerts a force against the lower surface of the diaphragm 51.
  • this force exceeds the downward force on the diaphragm '51 exerted by the springs 73 and 74, the diaphragm 51 moves upward, carrying the stirrup 60 with it.
  • the spring 73 is active only until flange 77 engages shoulder 78; further downward movement of the diaphragm is caused by force of spring 74 only.
  • the valve can also be closed manually by pulling the pull rod 43 which in turn will force the cylindrical rod 41 out from under the cam member 22, thereby causing the stem assembly 18 to move downward to close the passage between the inlet and outlet chambers.
  • the plug 48 is provided with a fusible metal core 49 which melts when the temperature reaches a predetermined maximum, thereby allowing the fluid in the diaphragm chamber 28b to escape and create low pressure in the diaphragm chamber. This in turn causes actuation of the trigger and descent of the stem assembly 18, as described above.
  • the cap closure 81 When it is desired to re-set the valve actuator apparatus to place it back in service after descent of the stem assembly 18, the cap closure 81 is removed and the key assembly 84 is secured to the hexagonal shaft 19.
  • the internal threads 85 in the key assembly 84 receive the external threads on the upper end of the hexagonal shaft 19.
  • the key assembly '84 is then screwed down until the collar 86 mounted coaxially on the key assembly 84 makes contact with the cap 79 and causes the valve to partially open.
  • the key assembly 84 is then manually lifted by the handle 87 until the cam member 22 on the stem assembly 18 passes above the cylindrical rod 41, swinging it aside en route.
  • the key assembly 84 is then removed and the cap closure 81 installed.
  • FIGURE 4 shows the actuator device applied to a modified form of valve.
  • the valve body has an inlet chamber 101 and an outlet chamber 102 separated by a divisional web 103.
  • the web 103 has an internally threaded opening to receive a valve seat 104.
  • a hexagonal valve member 105 which moves vertically within an opening 106 in the seat 104 is provided with a disk valve head 107 and a sealing ring 108.
  • a cup member 113 is inserted into the lower wall of the inlet chamber 101 and holds a compression spring 109.
  • Spring 109 engages the lower surface of the disk 'valve 107 and forces the sealing ring 108 against the seat 104 when the valve is in the closed position, as shown in FIGURE 4.
  • the valve body 100 is connected to the release housing 12 and an O-ring 110 prevents leakage.
  • the stem assembly 18 at its lower end 111 is hexagonal shaped and is provided with internal threads.
  • a screw 112 engages the threads and provides a means for actuating the valve member 105.
  • a passage 114 provides for communication of fluid between the inlet chamber 101 and the diaphragm chamber 28b.
  • the stem assembly moves axially downward when the fluid pressure in the diaphragm chamber 28b drops below a desired minimum or increases above a set maximum.
  • the stem assembly 18 moves axially downward it engages the upper end of the valve member 10 5, thereby forcing the sealing ring 108 away from the seat 104 and opening the passage between the inlet and outlet chambers 101 and 102, respectively.
  • a valve actuator device including a valve body, a stem mounted for axial movement within the casing and having a projecting portion extending into said walve body, a floating member mounted for axial movement within said casing, means preventing leakage between said floating member and said casing, said casing, floating member, stern and said means defining a chamber, passage means to provide communication between said chamber and the interior of said valve body, trigger means normally acting to prevent downward movement of said stem, first resilient means operatively positioned to exert a downward force on said floating member against fluid pressure in said chamber, means limiting the extent of travel of said first resilient means, second resilient means operatively positioned to exert a downward force on said floating member, means whereby the force of each of said resilient means may be independently adjusted, means operated by said floating member for releasing said trigger means upon movement of said floating member in either direction beyond a predetermined extent, and means for moving said stem axially downward upon release of said trigger means.
  • each of said resilient means comprises a coil compression spring.
  • a stationary casing including a valve body, a stem mounted for axial movement within the casing and having a pro jecting portion extending into said valve body, a floating member mounted for axial movement within said casing, a flexible diaphragm positioned between said floating member and said casing, said casing, floating member, stem and said diaphragm defining a chamber, passage means to provide communication between said chamber and the interior of said valve body, trigger means normally acting to prevent downward movement of said stem, a first coil spring operatively positioned to exert a downward force on said floating member against fluid pressure in said chamber, means limiting the extent of travel of said first coil spring, a second coil spring operatively positioned to exert a downward force on said floating member, means associated with said casing whereby the force of each of said springs may be independently adjusted, separate means on said floating member for releasing said trigger means upon movement of said floating member in either direction beyond a predetermined extent, and resilient means for moving said stern axial
  • a stationary casing including a valve body, a stem mounted for axial movement within the casing and having a projecting portion extending into said valve body, a floating member mounted for axial movement within said casing, a flexible diaphragm positioned between said floating member and said casing, said casing, said floating member, stern and said diaphragm defining a chamber, passage means to provide communication between said chamber and the interior of said valve body, resilient means operatively positioned to exert a downward force on said floating member against fluid pressure in said chamber, trigger means in said chamber normally acting to prevent downward movement of said stem; said trigger means including a trigger pivotally mounted on said casing and having an abutment, means on said stem having a downward facing shoulder adapted to engage said abutment, means operated by said floating member for swinging said trigger means in a direction to move the abutment out from under said shoulder upon movement of said floating member in either direction beyond a predetermined extent, and means for moving said stem axially

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Driven Valves (AREA)
  • Safety Valves (AREA)
  • Actuator (AREA)
US695053A 1968-01-02 1968-01-02 Safety valve actuator Expired - Lifetime US3429321A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69505368A 1968-01-02 1968-01-02

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US3429321A true US3429321A (en) 1969-02-25

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Application Number Title Priority Date Filing Date
US695053A Expired - Lifetime US3429321A (en) 1968-01-02 1968-01-02 Safety valve actuator

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US (1) US3429321A (US07585860-20090908-C00162.png)
BE (1) BE717375A (US07585860-20090908-C00162.png)
DE (1) DE1775016A1 (US07585860-20090908-C00162.png)
GB (1) GB1173868A (US07585860-20090908-C00162.png)
NL (1) NL6808982A (US07585860-20090908-C00162.png)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628562A (en) * 1968-10-10 1971-12-21 Rotterdamsche Droogdok Mij Nv Closing device with a stop valve which is situated outside the valve housing
US4017053A (en) * 1974-02-06 1977-04-12 Willis Oil Tool Co. Fluid pressure monitoring safety system
FR2557949A1 (fr) * 1984-01-09 1985-07-12 Joucomatic Perfectionnements apportes aux v
US5048791A (en) * 1990-11-29 1991-09-17 Parker Hannifin Corporation Shut off valve
US5261446A (en) * 1992-11-23 1993-11-16 Baker Gerald S Self-contained emergency shutdown valve
WO1994002768A1 (en) * 1992-07-24 1994-02-03 Barish, Benjamin, J. Automatic gas cut-off valve
US5913326A (en) * 1993-08-04 1999-06-22 Ruhrgas Aktiengesellschaft Automatic closing device for a shut-off device
US6460564B1 (en) * 1999-10-12 2002-10-08 Dieter J. Rief Automatic-locking shut-off valve for liquid suction systems
US20060124878A1 (en) * 2004-10-26 2006-06-15 David Jobe Readily demountable fill valve
US20080257420A1 (en) * 2007-04-20 2008-10-23 Fisher Controls International Llc Slam shut safety device
US20110259448A1 (en) * 2010-04-27 2011-10-27 May Lamar E Controlling fluid flow
CN101663520B (zh) * 2007-04-20 2012-05-30 费希尔控制产品国际有限公司 紧急切断安全装置
EP2497984A1 (de) * 2011-03-08 2012-09-12 Tyczka Totalgaz GmbH Sicherheitsabsperrventil und Verfahren zum Absperren einer Gasleitung
CN102734513A (zh) * 2011-04-15 2012-10-17 艾默生过程管理调节技术公司 用于快闭安全设备的故障安全保持塞组件
US20140083515A1 (en) * 2012-09-27 2014-03-27 Emerson Process Management Regulator Technologies, Inc. Slam shut safety device having disc anti-rotation
US20160025234A1 (en) * 2011-04-15 2016-01-28 Emerson Process Management Regulator Technologies, Inc. Torsional Spring for a Slam-Shut Safety Device
ITUB20152323A1 (it) * 2015-07-20 2017-01-20 Pietro Fiorentini Spa Valvola di blocco per gas e metodo di realizzazione di tale valvola di blocco
WO2023286045A1 (en) * 2021-07-12 2023-01-19 Ham-Let [Israel-Canada] Ltd. Safety valve

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE897499A (nl) * 1983-08-10 1983-12-01 Standard Sa Beveiligingsinrichting voor waterleidingen
EP0158776B1 (de) * 1984-04-14 1988-09-14 Drägerwerk Aktiengesellschaft Sicherheitsventil

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727503A (en) * 1927-08-17 1929-09-10 Franzheim George William Automatic cut-off
US2484940A (en) * 1947-07-03 1949-10-18 George W Franzheim Valve
US2701580A (en) * 1953-09-21 1955-02-08 Sullivan Valve & Engineering Co High and low pressure safety cutoff valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727503A (en) * 1927-08-17 1929-09-10 Franzheim George William Automatic cut-off
US2484940A (en) * 1947-07-03 1949-10-18 George W Franzheim Valve
US2701580A (en) * 1953-09-21 1955-02-08 Sullivan Valve & Engineering Co High and low pressure safety cutoff valve

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628562A (en) * 1968-10-10 1971-12-21 Rotterdamsche Droogdok Mij Nv Closing device with a stop valve which is situated outside the valve housing
US4017053A (en) * 1974-02-06 1977-04-12 Willis Oil Tool Co. Fluid pressure monitoring safety system
FR2557949A1 (fr) * 1984-01-09 1985-07-12 Joucomatic Perfectionnements apportes aux v
EP0148798A1 (fr) * 1984-01-09 1985-07-17 Joucomatic S.A. Vannes à commande par piston
US5048791A (en) * 1990-11-29 1991-09-17 Parker Hannifin Corporation Shut off valve
WO1994002768A1 (en) * 1992-07-24 1994-02-03 Barish, Benjamin, J. Automatic gas cut-off valve
US5261446A (en) * 1992-11-23 1993-11-16 Baker Gerald S Self-contained emergency shutdown valve
EP0599499A1 (en) * 1992-11-23 1994-06-01 Cooper Cameron Corporation Self-contained emergency shutdown valve
US5913326A (en) * 1993-08-04 1999-06-22 Ruhrgas Aktiengesellschaft Automatic closing device for a shut-off device
US6460564B1 (en) * 1999-10-12 2002-10-08 Dieter J. Rief Automatic-locking shut-off valve for liquid suction systems
US7647938B2 (en) * 2004-10-26 2010-01-19 Jobe Holdings Limited Readily demountable fill valve
US20060124878A1 (en) * 2004-10-26 2006-06-15 David Jobe Readily demountable fill valve
CN101663520B (zh) * 2007-04-20 2012-05-30 费希尔控制产品国际有限公司 紧急切断安全装置
CN102628518B (zh) * 2007-04-20 2015-02-18 费希尔控制产品国际有限公司 紧急切断安全装置
WO2008131153A2 (en) 2007-04-20 2008-10-30 Fisher Controls International Llc Slam shut safety device
US20080257420A1 (en) * 2007-04-20 2008-10-23 Fisher Controls International Llc Slam shut safety device
US8225812B2 (en) 2007-04-20 2012-07-24 Fisher Controls International Llc Slam shut safety device
WO2008131153A3 (en) * 2007-04-20 2009-03-05 Fisher Controls Int Slam shut safety device
RU2608846C2 (ru) * 2007-04-20 2017-01-25 Фишер Контролз Интернешнэл Ллс Быстродействующий предохранительный клапан, быстродействующее предохранительное устройство и способ сборки такого устройства
RU2472052C2 (ru) * 2007-04-20 2013-01-10 Фишер Контролз Интернешнэл Ллс Быстродействующее предохранительное устройство, способ сборки этого устройства и клапан
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JP2014098544A (ja) * 2007-04-20 2014-05-29 Fisher Controls International Llc 緊急遮断安全装置
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Also Published As

Publication number Publication date
NL6808982A (US07585860-20090908-C00162.png) 1969-07-04
DE1775016A1 (de) 1972-04-13
GB1173868A (en) 1969-12-10
BE717375A (US07585860-20090908-C00162.png) 1968-12-30

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